What are political metrics you ask? Simple: Polling Data.
Normally, polling data isn't terribly exciting stuff (unless you're a nerd for numbers like myself), but world-famous pollster Nate Silver's FiveThirtyEight is one of the best in the business and does so in a way that is, thankfully, presented in such a way that makes it fairly easy to understand for wonks and everyday folks alike.
Without going into too much depth, FiveThirtyEight compiles information from many hundreds of polls across the nation and in this election cycle, focusing primarily on the odds of which major party will gain or retain control of the United States Senate.
Now, I invite you to take a gander at today's latest update at the FiveThirtyEight's site giving the current odds of which party will come out victorious in next week's elections...
Though if you're a die-hard Democrat and are at all squeamish, might not be the best idea..